1911] Kofoid: The Genus Gonyaula.r. 217 



Synonomy: See G. spiinfei-a. It is highly probable that 

 G. spinifera of many writers is in reality G. digitale as here 

 defined. The possibility also of the inclusion of G. spinifera as 

 above defined, together with G. digitale, is excluded only in case 

 of those writers, e.g., Paulsen, who have noted the distinctness 

 •of G. levanderi, or in those papers accompanied by diagnostic 

 figures. The sketches published by Henckel (1909) of G. grani 

 from the Caspian Sea seem to be referable to G. digitale. In any 

 event this supposed new species from the Caspian Sea requires 

 a more critical diagnosis before its distinctness from G. digitale 

 €an be recognized. 



Distribution: This species occurred rather frequently in 

 plankton taken in the harbor at Loring, Alaska (55" 40' N, 131° 

 35' W), September 15, 1905 (see pi. 9, fig. 4), and a few speci- 

 mens have been recognized in the plankton of the San Diego 

 region taken in early summer (No. 919, June 22, 1905), which 

 seem to be referable to this species. They are possibly of north- 

 ern origin, carried southward in the California current. Full 

 data as to the occurrence of this species in the San Diego region 

 are not available since the species was not distinguished from G. 

 spinifera during the examination of most of the collections. 

 Essentially a northern species but not confined to neritic plank- 

 ton though favoring coastal region, Faeroes, Iceland, North Sea, 

 Concarneau, Naples, Caspian Sea, coasts of Alaska and Califor- 

 nia. In the absence of figures it is wholly conjectural to base 

 reports of the occurrence of this species upon records of G. spini- 

 fera, as upon those of Cleve (1901a), though it is extremely prob- 

 able that many records of the aforesaid species are, especially in 

 northern waters, in reality referable to G. eligitale wholly or in 



part. 



4. Gonyaulax diegensis sp. nov. 



PI. 13, figs. 21-24; pi. 16, fig. 40. 

 Gonyaulax spinifera, Seluitt (1895), pi. 9, figs. 34,.,. Eeference here 



problematical. 

 G. spinifera, Wright (1907), p. 5, pi. 1. fig. 14. 

 G. polygramma, Meunier (1910), pp. 54-55, pi. 3, figs. 5-13. 



Diagnosis: A large robust species with short stout apical 

 horn, elongated apex, two or three antapical horns, widely dis- 



